Improvement in circular-sawing machines



0. A. DEAN.

(Jirculau- Sawing-Machinesf Nol/19,643. PatenfedApri|14,1874.

A Witnesses. l lnvenqn n w@ Per ZK UNITED STATES.V

PATENT OFFICE.

OSCAR A. DEAN, OF BETHEL, VERMONT.

IMPROVEMENT |N cmcuLAR-sAwlNG MACHINES.

Specification forming part of Letters Patent No. 149,643, dated April14, 1874; application led February 14, 1874.

fo all whom it may concern:

Be it known that I, OSCAR A. DEAN, of Bethel, in the county of Windsorand State of Vermont, have invented a new and useful Improvement inCircular-Sawing Machines, of which the following is a specification:

Figure l is a side view of my improved-saw ing-machine. Fig. 2 is a topview of the same, partly in section, through the line a: m, Fig. 1, andpart of the saw cap or guard being broken away.

l Similar letters of reference indicateI corresponding parts.

My invention has for its/ object to improve the construction of circulr-saw machines, so as to prevent the lumber/ and slivers from beingthrown against the operator, to prevent the operators hands from beingcut while attending the saw, and to prevent the operator from beinginjured by the saw iiying into pieces when running free, and when sawingthin lumber; and is an improvement upon the patent granted to me August12, 1873, No. 141,702. The invention consists in the combination ot thesaw cap or guard, its supporting-lever and'guide-blocks, the slottedstandards, and the hand-nuts with the saw, the table, and the gage 5t inthe combination of the strengtheningarm with-the adjustable guideblocksand the lever that carries th'e saw cap or guard.

A represents the lframe or table of the machine. B represents thecircular "saw, which is hung and driven in the ordinary way. O is thegage, to the outer side of which is attached a slotted arm, D, throughthe slot of which passes the clamping-screw E, by which the gage O issecured in place when adjusted.

' The slot of the arm D also receives a guide pin or block, F, to keep.the gage always par.-v -fallel with the saw, however it may be adjusted. To the table A, in the rear of the saw B, is

placed a circular spreader, G, which enters the kerf and opens orspreads the lumber, so that the said lumber may not bear against thesides of the rear part of the saw. H is a cap or guard, which tits overthe upper part of the saw, and prevents anything from coming in contactwith the upper part of the saw, and

also prevents slivers from beingthrown by crosses the rear part of thetable A, and the outer end of which passes through the slot of avertical standard, J, attached to the outer rear part of the saidtablevA, where it is secured in place adjustably'by a hand-nut, K. Thelever I also passes through a guide-slot in the lower part of one of theblocks L, the inner sides of which are tongued to tvupon the slottedstandard M, attached to the rear end ofthe gage O,where they are securedin place adjustably by a bolt and hand-nut, N. By this construction, byloosening the hand-nuts K N the lever I and cap or guard H may be raisedand lowered as the thickness ofthe lumber may require. To the blocks Lis attached an arm, O, the end of which rests upon the end of the leverI to strengthen it, as shown in Figs. 1 and 2. 'lhe lever ,I also servesas a guard to prevent the lumber from being thrown up by the rear partoi the saw. The inner side of the rear part of the gage O is cut away,as shown in Fig. 2, so that the lumber may be free to spread upon bothsides of the rear part of the saw.

With this construction the saw cap or guard can be adjusted withoutdisturbing the gage, and the gage can be adjusted without disturbing thesaw cap or guard.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of the cap or guard H, the leverI, guide-block .L, slotted standards J M, and hand-nuts K N with the sawB,`

the table A, and the gage G, substantially as herein shown anddescribed.

2. The combination of the arm O with the adjustable guide-blocks L andthe lever I, that carries the cap or guard H, substantially as hereinshown and described.

OSCAR A. DEAN.

Witnesses: 'f

y H. C. TENNENT, J As.' G. HENRY.

